package thead;

/**
 * 每个线程循环 1w 次，累加变量 count 的值，count 默认值为 0，注意线程安全问题。
 */
public class practice4_1 {
    private static int count = 0;
    private static final Object lock = new Object();
    public static void main(String[] args) throws InterruptedException {
        Thread t1 = new Thread(() ->{
            synchronized(lock) {
                for(int i = 0; i < 10000;i++) {
                    count++;
                }
            }
        });
        Thread t2 = new Thread(() ->{
            synchronized(lock) {
                for (int i = 0; i < 10000; i++) {
                    count++;
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(count);
    }
}
